However, additional benefits in efficiency and low maintenance, even at the expense of low cost, can be evaluated to find an ideal cost/benefit ratio. Privacy Policy 9. This could be described as cool, quiet, unobtrusive, inexpensive, efficient, and low-maintenance; or three wants summarized in six needs. Packages of hosiery goods, steel sheets, etc., can be transferred using gravity conveyors. To perform this, engineers must be able to specify the best equipment for a design as well as be subject matter experts on constructibility, operations, maintenance, human behavior, economics, and manufacturing. The conveyor system is completely dismantled. CONVEYORS are employed to transport materials, over a fixed path which may be horizontal or inclined (up or down), to different locations in a factory. Criteria for hearing protectors with good signal and speech audibility in general To find a simple criterion for selection of hearing protectors which perform well with regard to “signal audibility (general)”, “speech intelligibility”, and “perception of informative operating sound” the BIA explored several options using the BIA’s European hearing-protector database. The main factors for evaluation can vary from a half dozen to hundreds. If the bearer of a hotel removes cups, plates and other crockery from a table by placing them in a tray, it is called material handling by unit loads. Engine drive and are generally used for outdoor applications. The following factors may be considered while selecting a material handling equipment: The size of material, its shape, weight, delicacy, nature (solid, liquid, gas) and its chances of getting damaged during handling, etc., should be considered. CRANES are employed for lifting and lowering bulky items and packages or cases. Gravity or air flow moves the material ahead. ADVERTISEMENTS: After reading this article you will learn about:- 1. The biggest difficulty in evaluating so many characteristics in complex projects is the overwhelming degrees of freedom. Image Guidelines 4. Instead, they should be distilled into needs and evaluated as key aspects in equipment selection. The repairable parts of the system, after inspection are corrected for small repairs and minor defects are rectified. Conversely, equipment selection for a mechanical engineer is as much an art of application as a science of technology. 5.2.3 Equipment selection. Replacement of Parts. This can be a hard reality for building owners (customers). The economic considerations such as owning costs, operating labour costs and operating fuel costs of equipment are most important in selection of equipment. Preventive maintenance consists of frequent inspections and examination of the material handling equipment, with special attention to the components requiring it. equipment selection,purchase specification,maintenance 1. under guidence of kv santosh kumar department of pharmaceutical analysis(pa&qa) equipment selection,purchase specification,maintenance 1 vignan pharmacy college, vadlamudi. Engineers are the subject matter experts that select based on the criterion to be evaluated, not only first cost. The following factors or principles should be considered while selecting the office machine and equipment. They transfer small jobs which can slide down under gravity. Items like refrigerators, air-conditioners or televisions can be sent to distant places using the principle of containerization. Rollers and belts are checked, adjusted^ repaired. Material is loaded in the trailers (CH: 1, 2, 4, 6, 9, 14) which are attached to the towing tractor. Disclaimer 8. Three stages of preventive maintenance are: The maintenance system for a few material handling equipment like cranes, hoists, and conveyors has been discussed below: All parts, open or covered are inspected for wear and tear. Conveyors are more suitable for mass production on fixed routes and powered trucks for batch production; because conveyors though costly, can handle more volume of production per unit time as compared to trucks, whereas a truck is more flexible equipment. The key aspects that mechanical engineers need to consider in equipment selection are nuanced. Once prioritized, these rank as inexpensive, cool, quiet, efficient, low-maintenance, and unobtrusive. The type of production affects to a large extent the selection of the material handling equipment. A jib crane is preferred where lifting of the jobs is required in a few locations only or where bridge crane cannot be erected; for example, outside near the wall of the building. This principle of unit load can also be explained like this. Search Products And Discover New Innovations In Your Industry!! Unless a brand new plant is being designed, users decide to replace a pump because of its age and wear or persistent reliability issues. Selection of Material Handling Equipment 2. Containerization uses principle of unit load. Brakes are adjusted and lubrica­tion is provided wherever necessary. Hence, this study aims to determine the factors that influence the sustainable selection of onsite construction equipment and machineries. In other words, there is an art and science to defining and evaluating key aspects in order to choose the proper equipment. A total cost-of-ownership approach that identifies needs and assigns values to be evaluated can balance the limitations of first-cost considerations on total comfort, satisfaction, and long-term costs. A bucket conveyor moves the granular materials or powder or liquid. Naturally, the best equipment will be one which permits smooth and continuous production flow, involves less accidents, reduces production cycle time, promotes better working conditions, incurs less fatigue to the operators and brings down the total material handling costs. It requires financial sensitivity and analysis. The material handling equipment should be able to handle the maximum output. Characteristics 4. Definitely, he would have spent much more time and efforts in removing all the crockery by one cup or one plate at a time. Forks can be lifted to the desired height along with the material (boxes, etc.) 25.33), it is easy to handle materials in unit loads and stack them neatly and properly (even as high as the ceiling) thereby reducing the storage space requirements. By using available machines (like one for strapping steel strips around cotton bales), fork lift trucks, skids and pallets (see Fig. Selection of Material Handling Equipment 2. Equipment selection for a hard-rock mine typically begins with or soon after the planning parameters of the stoping operation is completed; therefore, equipment used for stoping should be suitably sized for the stope dimensions and the characteristics of the orebody. Due to improved e ciencies after maintenance and overhauls, the operating costs of the equip- Gear box is properly lubricated, various fasteners are tightened and safety guards are checked. Plagiarism Prevention 5. The material can be loaded in the trays automatically. The most advanced equipment is not a need, but quality is—and, unfortunately, sometimes top name brands include cheaper heat-transfer materials, unreliable bearings, or statistical quality control rather than start-up and test-inspection techniques. Account Disable 12. A fixed conveyor is used on the mass production shop floor whereas portable conveyors are preferred for intermittent jobs like unloading of a freight car, etc. Afterwards, the containers can be loaded on railway trailers and can be taken to places from where, with the help of cranes, they can be shipped. Once identified from the project needs, key aspects an engineer should evaluate in equipment selection can be summarized in the simple math of weighted scoring, then mapped to money in LCCA, and reinforced for posterity in logic statements. Special Equipment. One challenge is identifying aspects for consideration. Systems like open gear transmission, couplings, riveted, and bolted joints, trolley, brakes, guards, etc., may be repaired. Plant engineers typically spend their time with the process to make sure machinery is working, water is flowing, power is produced, lights are up and no environmental problems are developing. EMR9(2) selection of explosion protected equipment (EPE) Selection of EPE will always follow the area classification. HAZARDOUS AREA ZONES AND EQUIPMENT CATEGORIES Overview . A typical repair cycle may be as follows: This cycle involves 15 inspections, 4 repairs and 1 overhaul. The net-present or net-future values from a LCCA will ensure the total costs associated with a particular equipment selection have been considered. In this system, big metal containers have number of small products filled in them. Worn out or unworkable components like wire ropes, wheels, bearings, bolts, etc., are removed. Most of all, a good foundation in engineering is needed, along with common sense and the ability to understand how important these nuanced selections are to achieve many years of comfort, safety, and performance. This diverse knowledge is necessary to create the roadmap for equipment evaluation. In this role, he helps to de­velop and implement solutions to conserve energy, waste, and water; integrate gener­ation; and incorporate renewable energy. They are not, as a rule, experts on any particular type of machinery. Creating the roadmap for equipment evaluation. Reviewing a significant list of evaluation criteria also enhances creative thinking and ensures selected equipment does not have a fatal failure for critical considerations not reviewed in a purely limited evaluation. Seth Pearce is director of design and development for Southland Energy, a division of Southland Industries. Equipment Selection for Surface Mining: A Review Christina Burt Department of Mathematics and Statistics, University of Melbourne, Melbourne, ... (1997)) or some optimization criteria, this may also lead to mixed-type (i.e., heterogeneous) eets. The type of explosion protection of the equipment is to be suitable for the zone of use. An example can be illustrated in three owner "wants": a cutting-edge working environment, budget conformity, and reasonable operating costs. After that, degrees of obtrusive can be weighed at the expense of the other needs and a final selection can be made. Similarly, a separate ground in the same conduit as the power conductors provides a better ground return path than a ground path via the equipment or building steel. By preventive maintenance, the equipment can be kept running thereby minimizing costly interruptions in the production schedule. In circumstances where others will be procuring, if options between equipment choices will still be made, it is important to rank two to five of the highest evaluated equipment, with short comments why. In multistorey plants, material is lifted up and transported by lifts. Every material handling equipment possesses certain characteristics with respect to: In FORK LIFT TRUCK (see Fig. The single greatest pressure on any evaluation is typically cost, and more commonly first cost.The first cost is comprised of the capital costs to design, furnish, and install a specific piece of equipment, and it is affected by project speed. Tractors, three wheeled or four wheeled (CH: 1, 2, 4, 6, 9, 12, 15, 16) employ I.C. Thanks for visiting my selection criteria examples page. Linear algebra offers advanced means to reconcile huge interrelated equations, but equipment selection is best served by a simpler routine. The time duration between two stages say (c) or (d) and (e) may range from 1 month to 6 months or even more, depending upon the type of material handling equipment and the time for which it has been used. In a jib crane the hoist unit may be mounted on an I-section jib which is in turn supported on a column. 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